31-05-2019, 05:48 AM
Not necessary, there are two angular contact bearings on the nose of the crank, fitted back to back, this takes car of the clutch 'push' as well as the crank end float. The rear only needs to be a roller bearing. It's a beefy roller as it has to deal with the rotational mass of the flywheel which loads & unloads during clutch operations.
Any original crank you use will flex, even the 1&1/2 sports ones if revved enough. Most who do "press-on" driving fit a Phoenix, If you are rebuilding a gentle driver then even the early bent wire cranks do a sterling job, but seeing as engine rebuilds are expensive, a modern Phoenix is a good preventative measure if your budget stretches to it.
For a non-flexing crank - see Tony Betts website for his superb counterbalanced Hadley Cranks !!
Aye
Greig
Any original crank you use will flex, even the 1&1/2 sports ones if revved enough. Most who do "press-on" driving fit a Phoenix, If you are rebuilding a gentle driver then even the early bent wire cranks do a sterling job, but seeing as engine rebuilds are expensive, a modern Phoenix is a good preventative measure if your budget stretches to it.
For a non-flexing crank - see Tony Betts website for his superb counterbalanced Hadley Cranks !!
Aye
Greig